Retardation plate, polarizing plate with optical compensation layer, image display device, and touch panel image display device

摘要

There is provided a retardation plate capable of realizing an image display device in which the color in an oblique direction is neutral. In the retardation plate of the present invention, the in-plane retardation Re satisfies 100nm≦Re(550)≦160nm, Re(450)/Re(550)≦1, and Re(650)/Re(550)≧1, and Nz The coefficients satisfy Nz(550)1, 0≦|Nz(450)-Nz(550)|≦0.1, and 0≦|Nz(650)-Nz(550)|≦0.1.